services_all_services: "{{
  services_all_hosts | map('extract', hostvars, 'services_host_services') | map('dict2items') |
  flatten | items2dict }}"
services_rproxy_add_hosts: "\
  {% set add_host_list = [] %}\
  {% for service in ( services_all_services | dict2items ) %}\
  {{ add_host_list.append('--add-host-' ~ service.key ~ ':' ~ service.value.address) }}\
  {% endfor %}\
  {{ add_host_list | join(' ') }}"